Jamb Chemistry Past Questions and Answers

Question 1536:

• JAMB 2009

The type of iron that is best suited for welding, making nails, chains and iron rods is

A. Pig iron
B. Wrought iron
C. Cast iron
D. Iron pyrites

Question 1537:

• JAMB 2009

In the electrolytic extraction of aluminum, the function of the molten cryolite is to

A. Precipitate aluminium hdroxide
B. Lower the melting point of aluminium oxide
C. Act as a raw materials
D. Act as a solvent

Question 1538:

• JAMB 2009

One of the products of the thermal decomposition of sodium trioxonitrate (V) is

A. Sodium
B. Nitrogen
C. Sodium dioxonitrate (III)
D. Sodium oxide

Question 1539:

• JAMB 2009

A cracking process in petroleum refining can be represented by

A. Heptane to heptene
B. Heptane to 3-methylhexane
C. Heptane to propene and butane
D. Heptane to 2,3,3-trimethybutane

Question 1540:

• JAMB 2009

Which of the following molecules has two other positional isomers?

A. CH₃CH₂Br
B. CH₃CHBrCH₃
C. CBr₂F₂
D. CH₂CHBrCH₂Br